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No. 615,8l5. Patented -De0.vl3, I898.

v S. K. DENNIS.

v KNOTTER FOR GRAIN BINDERS.

(Application filed Apr. 22, 189B.) (No Model.) 3 Sheets-Sheet l.

No. 6|5,8l5. Patented Dec. [3, I898.

. s. K.- DENNIS.

' KNOTTER FOR GRAIN BINDEB S.

(Application filed Apr. 22, 1898.)

(No Model.) 3 Sheets-Sheet 2.

, Ill

Patented Dec. I3, I898. S. K. DENNIS.

KNOTTER FOB GRAIN- BINDERS.

(Application filed Apr. 22, 1898.)

3 Sheets-Sheet 3.

Ifieior 6 4 Samae iij6fl/Zi5 n: Noam: P575118 00,. PuoTo-uTHo wnshmmou ac p I UNITED STATES PATENT OFFICE.

SAMUEL K. DENNIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO TIIE PLANOMANUFACTURING COMPANY, OF SAME PLACE.

KNOTTER FOR GRAlN -BINDERS.

SPECIFICATION forming part of Letters Patent No. 615,815, dated December13, 1898.-

Application filed April 2 2, 1 8 9 8.

To all whom, it may concern.-

Be it known that I, SAMUEL K. DENNIS, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Knotters'forGrain-Binders, of which the following is a specification.

My invention relates to certain improve- 'ments in the cord-holders ofknotters for grain binders, and is concerned especially with the uppermember of the clamping mechanism which is generally called the hood.

My invention relates, first, to a construction in which the hood properis detachably mount-j ed in the framework, instead of being integraltherewith, so it can be readily removed and replaced in case of wearwith a very slight expense.

It further relates to such a method of mounting the hood as will causethe pressure of the cord tending to separate the clamping members to betransmitted directly to the point of support of the hood, so as toprevent any tendency of the clamping members to bind upon each other.

My invention finally relates to a construction in which a portion of thehood is so shaped that by its cooperation with the other clamping memberit prevents any possibility of the cut-off ends of the cord working inbetween the. actual bearing-surfaces of the clamping members, andthereby'unduly expanding them, so'as to prevent their accurately holdingthe cord that is being tied.

Referring to the drawings, in which the same letters of reference areused to designate identical parts in all the figures, Figure 1 is a sideelevation of a knotter constructed in accordance withmy invention andwith a portion of the breastplate broken away to disclose the tying-billand cord-holder, the parts being in the'position at which they remain atrest between the actual tying operations. breastplate in central.longitudinal section and with the tying-bill turned about a quarter of arevolution from the position of Fig. 1 and with the needle advanced tothe position it occupies during the actual operation of tying thebundle. Fig. 3 is a section on the line 3 3 of Fig. 1, on an enlargedscale,

Fig. 2 is a similar View, but with the.

Serial No. 678,521. (No model.)

showing the cord-holder in elevation. Fig. 4

is a plan view of the cord-holder and tyingbill in the relativepositions of Fig. 2. Figs. 5, 6, and 7 are a top plan view, sideelevation, and a bottom plan View, respectively, of the hood or upperclamping member of the cord-holder. Figs. 8 and 9 are top plan views andside elevations, respectively, of the tyingbill and cord-holder in therelative positions these parts assume at the time when the knot isalmost tied, showing the relation of the two strands of the cord. Figs.10 and 11 are similar views of the cord-holder in the positions of Figs.8 and 9, but showing the old form of cord-holder and the relation of thetwo strands of the cord possible under the old construction. Fig. 12 isa top plan view of the lower cord-holder member or disk without itschilled portion in place. Fig. 13 is a similar view of the cord-holderdisk after the chilled portion thereof is cast in its place, and Fig. 14is a section thereof on the line 14 14 of Fig. 12 with its chilledportion in place.

WVhile my invention is capable of being applied to the various forms ofcord-holders, I

have shown my invention as applied to the form of cord-holder shown inthe patent to Stewart, No. 512,762, January 16, 1894, to which patentreference is made for a-fuller disclosure and description of theconstruction and operation of the parts of the knotter not strictlyconcerned with my present invention.

In the drawings, A represents the breastplate, 13 the binding-arm orneedle-arm, and C the knotter-frame, which is mounted on thebreastplate. The binding-shaft D, mounted in any suitable way, passesthrough a tubular bearing at the upper end of the knotter-frame, and thesegmental gear-wheel E is fastened to this shaft as usual. Theknotting-hook F is of the ordinary bill-hook type and is mounted in theframe C and actuated by the gear-wheel E in the customary the methodmore completely disclosed in my application for a patent thereon, SerialNo. 675,233, filed March 26, 1898. This construction furnishes anextremely hard chilled bearing-surface on this disk at the point Wherethe greatest wear occurs, and thus adds a much greater life to thecord-holder while in no way interfering with the strength and durabilityof the malleable body portion of the disk and its bearings.

In the old construction, which is shown in the aforesaid patent and alsoin Figs. 10 and 11 of the present application, the hood H was integralwith and formed a part of the knotter-frame C, while in the presentconstruction I make the hood separate from said frame and of the shapeshown in detail in Figs. 5, 6, and 7. This hood has the tubular bodyportion II, which snugly surrounds the stem G of the disk G and yetpermits it to rotate freely therein. An offset portion H extendingupward at one side of the body portion H, terminates slightly above theupper surface of the body portion H and forms a shoulder H as best seenin Figs. 5 and 6. Above this shoulder H is the pintle or bearing lug Hwhich takes into a properlyshaped socket formed in the under side of theframe 0, so as to permit of a slight vertical movement of the hood H,while preventing its rotation with the disk G. As will be seen fromFigs. 1, 2, and 9, this pintle H is substantially in a line between theaxes of the cord-holder and of the tying-bill and at a position where itis directly over that portion of the cord-holder where the greateststrain is transmitted to the cord. The location of the bearing at thispoint serves to transmit the stress of the cord in a line parallel tothe axis of the cord-holder and prevents any tendency for the hood tocramp and bind upon the stem G of the cord-holder disk, which tendencywould be present if the binder were at another position, say one hundredand eighty degrees from the location shown, where the stress from thecord would be transmitted to the bearing-surface at an angle ofsubstantially fifty degrees with the axis of the cord-holder instead ofparallel thereto.

By making the hood proper separate from the frame 0 and giving it acertain amount of play I am enabled to accommodate the cord-holder tothe difierent thicknesses of twine as well as to replace the hoodreadily and with a slight expense in case it becomes worn through thefriction of the cord or otherwise, as is frequently the case. Thismaking of this hood detachable also enables me to construct it ofchilled or otherwise hardened metal, which cannot be done if it isintegral with the frame 0.

The second feature of my invention relates to the employment of thedeflecting-wing H upon the hood. This deflecting-wing is of the shapebest shown in Figs. 5, 6, and 7, and extends from where the conicalsurface of the cord-holder disk begins down almost to its edge. Thecurved edge H thereof is tapered down so as to form a kind of ashearing-plate to operate in connection with the conical surfaceof thedisk G to shear the cut-off ends of the cord. The action of thisdeflectingwing H in preventing any possible clogging of the cord-holderby the cut-off ends of the twine is best shown in Figs. 4: and 8 to 11inclusive, Figs. 10 and 11 of which represent the possible action of theold construction when a long end of the twine is cut off.

Referring to the position of the parts shown in Fig. 4, in which thetying-bill has made about a quarter of a revolution and the cordholderis about to begin its rotation, it will be seen that the free end '1 ofthe twine, which is subsequently to be cut off against the knife I, iscarried by the arm G around the axis of the cord-holder. When the disk Gis revolved through about one hundred and twenty degrees to the positionshown in Figs. 8 to 11, if the old construction is employed and the freeend T is unusually long there is the possibility of it being carriedbeneath the needle-strand of the cord and being clamped by saidneedle-strand upon the conical face of the disk, as shown in Figs. 10and 11. If it becomes clamped in this position during the subsequentrevolution of the disk, and especially after the end has been severed bythe knife I, it almost invariably becomes carried in between the conicalsurface of the disk and underneath the quadrant H of the hood. There isthen nothing to dislodge it from this position and it becomes wrappedaround the shaft G of the cordholder disk at the termination of theconical surfaces, and thus separates the two clamping members, so thatthey fail to hold the free end of the cord properly and the knotterfails to tie on account of the slipping which can result. In my improvedconstruction, where the wing H is employed, it will be seen that thecurved edge 11 of the wing tends to shear and guide the free end T ofthe cord off from the cone and down to the position shown in Figs. 8 and9, where it becomes impossible for the needle-strand of the cord toclamp it upon the cone and to carry it be neath the quadrant H Even ifit should be carried upon the wing H and be clamped there by theneedle-strand there would not be any possibility of its being carriedbeneath the quadrant H owing to the fact that the wing H is stationary.

It will be seen that I have devised certain new and usefulimprovementsin cord-holders, that my invention is capable of some modifica tions,and that I do not desire to be limited to the exact forms shown anddescribed, only so much as may be necessitated by the prior art.

I claim-- 1. In a knotter, the combination of theframe and the disk,connections between the frame and the hood for holding it from rotationwith the disk, and means for rotating the disk, substantially as shownand described.

2. In a knotter, the combination of the frame 0, with the tying-bill F,the cord-holder disk G having its stem G revolubly mounted in said frame0, the hood H mounted upon the stem G3 between the frame 0 and the diskG, connections between the frame 0 and the hood H for holding it fromrotation with the disk, said connections being located substantially ina line between the axes of the tying-bill and cord-holder shafts, andmeans for rotating the disk and tying-bill, substantially as shown anddescribed.

3. In a knotter, the combination of the frame, the tying-bill mounted insaid frame, with the cord-holder disk having its stem revolubly mountedin said frame, the hood H mounted upon the stem and between the frameand the disk, connections between the frame and the hood for holding itfrom rotation with the disk, said connections consisting of a luglocated substantially in a line between the axes of the tying-bill andcord holder shafts and cooperating with a socket in the frame, and meansfor rotating the disk substantially as and for the purpose described,

with the hood having the deflecting-wing H cooperating with theoperative surface of said disk to shear off the cord ends, substantiallyas and for the purpose described.

5. In a knotter, the combination of the rotating cord-holder diskhaving'the arm Gr substantially as and for the purpose described, withthe hood having the wing H with its beveled edge H cooperating with theoperative surface of said disk to shear off the cord ends, substantiallyas described.

6. In a knotter, the combination of the conical rotating cord-holderdisk having the arm G 'substantially as and for the purpose described,with the hood having the deflecting-wing H with its under surfaceconforming to the conical surface of the disk and its beveled edge Hcooperating with said con ical surface to shear off the cord ends, sub=stantially as and for the purpose described SAMUEL K. DENNIS.

Witnesses:

E. N. ERWIN, E. A. Prnnoni

